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(1887-1953). German-born architect Erich Mendelsohn was known for his pioneering work in steel and concrete. Born on March 21, 1887, in Allenstein, Germany (now Olsztyn, Poland), Mendelsohn became an English citizen in 1938 and moved to the United States in 1941. His Einstein Tower in Potsdam, Germany (1921), is a notable example of expressionism in architecture. He died on Sept. 15, 1953, in San Francisco, Calif.